Arrays - Find missing numbers in a Sequence

Question

I\'m trying to find an easy way to loop (iterate) over an array to find all the missing numbers in a sequence, the array will look a bit like the one below.

var nu

Answer 1

const findMissing = (numarr) => {
  for(let i = 1; i <= numarr.length; i++) {
      if(i - numarr[i-1] !== 0) {
        console.log('found it', i)
        break;
      } else if(i === numarr.length) console.log('found it', numarr.length + 1)
    }
  };

console.log(findMissing([1,2,3,4,5,6,7,8,9,10,11,12,13,14]))